Software Friction

As a Dutch ex-Navy officer, we just called this "friction" as everyone had read Von Clausewitz during officer training and was familiar with the nuances of the term. Militaries overwhelmingly address this problem by increasing redundancy, so that there are as few single points of failures as possible. It is very rare to encounter a role that can only be filled by a single person, a well designed military organization will always have a plan for replacing any single individual should they accidentally die.

"I can make a brigadier general in five minutes, but it is not easy to replace a hundred and ten horses" -- attr. Lincoln (exact words vary by source)

It's noticeable how few computer wargames simulate any of this, instead allowing for frictionless high speed micromanagement.